Fastwarm underwood heating mat kits are industry leading heating systems that can be used as a primary heat source. Fastwarm underwood heating mats comprise of the thinnest (2mm) fluoropolymer (Teflon) coated, dual-core resistive heating cable on the market. The cables are encased between two layers of heat reflective aluminium foil and are suitably spaced to provide 140W output. Fitting a Fastwarm underwood heating mat is suitable for any DIY enthusiast. Fastwarm underwood heating mat kits come with a peace of mind lifetime guarantee (50 years) as we only use the highest quality components sourced across the globe. Fastwarm heating cables use Teflon as an outer coating rather than PVC, meaning you can rest assured that once installed, your Fastwarm underfloor heating system will last a lifetime.